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95 lines
3.2 KiB
95 lines
3.2 KiB
// Copyright The OpenTelemetry Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package metric // import "go.opentelemetry.io/otel/metric"
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import (
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"context"
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"go.opentelemetry.io/otel/attribute"
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"go.opentelemetry.io/otel/metric/number"
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)
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// MeterImpl is the interface an SDK must implement to supply a Meter
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// implementation.
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type MeterImpl interface {
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// RecordBatch atomically records a batch of measurements.
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RecordBatch(ctx context.Context, labels []attribute.KeyValue, measurement ...Measurement)
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// NewSyncInstrument returns a newly constructed
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// synchronous instrument implementation or an error, should
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// one occur.
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NewSyncInstrument(descriptor Descriptor) (SyncImpl, error)
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// NewAsyncInstrument returns a newly constructed
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// asynchronous instrument implementation or an error, should
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// one occur.
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NewAsyncInstrument(
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descriptor Descriptor,
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runner AsyncRunner,
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) (AsyncImpl, error)
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}
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// InstrumentImpl is a common interface for synchronous and
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// asynchronous instruments.
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type InstrumentImpl interface {
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// Implementation returns the underlying implementation of the
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// instrument, which allows the implementation to gain access
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// to its own representation especially from a `Measurement`.
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Implementation() interface{}
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// Descriptor returns a copy of the instrument's Descriptor.
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Descriptor() Descriptor
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}
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// SyncImpl is the implementation-level interface to a generic
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// synchronous instrument (e.g., ValueRecorder and Counter instruments).
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type SyncImpl interface {
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InstrumentImpl
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// Bind creates an implementation-level bound instrument,
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// binding a label set with this instrument implementation.
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Bind(labels []attribute.KeyValue) BoundSyncImpl
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// RecordOne captures a single synchronous metric event.
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RecordOne(ctx context.Context, number number.Number, labels []attribute.KeyValue)
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}
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// BoundSyncImpl is the implementation-level interface to a
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// generic bound synchronous instrument
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type BoundSyncImpl interface {
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// RecordOne captures a single synchronous metric event.
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RecordOne(ctx context.Context, number number.Number)
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// Unbind frees the resources associated with this bound instrument. It
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// does not affect the metric this bound instrument was created through.
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Unbind()
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}
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// AsyncImpl is an implementation-level interface to an
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// asynchronous instrument (e.g., Observer instruments).
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type AsyncImpl interface {
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InstrumentImpl
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}
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// WrapMeterImpl constructs a `Meter` implementation from a
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// `MeterImpl` implementation.
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func WrapMeterImpl(impl MeterImpl, instrumentationName string, opts ...MeterOption) Meter {
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return Meter{
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impl: impl,
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name: instrumentationName,
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version: NewMeterConfig(opts...).InstrumentationVersion,
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}
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}
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